BNR34 figured out one signal of the main engine hairness
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By joshuaho96 · Posted
Unless it's a proper track pad you're probably getting uneven pad deposits. -
If the pads are just street pads (ie, stocko BMW offering) then the shuddering is most likely to just be uneven pad material (ie binder) deposition onto the rotor. If it does it next time you're out, use some 240-300 grit paper on both faces of the rotors. Just fold it over, hand hold it and spin the rotor by the wheel studs. Then go back out and see if it feels different (ie better) than it did immediately before. And then upgrade pads to something tougher perhaps. Also to reconsider how you treat the brakes on your warmup, while lapping and on your cool down. I'm not sure of the best advice here, but maybe something about what you are doing is the cause. Going too hard without a decent warmup? Leaving the foot on the brake when stationary while they are hot (ie after you spin off!!! :D), or not using the brakes at all during the cool down, or only at the very end of the cool down. Or any of the combinations, variations and other imaginable sins that are possible. Maybe you need some cheapo brake ducting added for the track to keep temperatures under control. If you can get some temperature paint or crayons, you could check to see how hot the brakes are actually getting and if that looks acceptable or scary. -
I'd just guess at the usual suspects really. There's not that much to a braking system movement wise and everything has to be right or you get shudder or what feels like warping. In my case we were talking the wheel moving 100mm in every direction 5 times a second (it was ROUGH), like driving over train tracks continuously or something. I used to get gnarly shudder when pads got warm, and it turns out the actual pad was the wrong (yet also compatible?) size. This probably isn't your issue, and another issue should feel something through the pedal, - fade if the pads are way too hot, or a spongy pedal if your fluid has got way too hot etc. Also because BMW it could be weird BMW abs shit -
By Looney_Head · Posted
Thanks, its a distance car lol, good from far, but far from good -
I’m pretty sure it’s Hekkelun coffee in Nishishimbashi Tokyo. He seems to have become a bit of an internet sensation with his caramel puddings (which are delicious) so it gets a bit crowded and isn’t the chill environment I like for a coffee..
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